{ ‖, n. Excessive or extended use of the b sound in speech, due to conversion of other sounds into it, as through inability to distinguish them from b, or because of difficulty in pronouncing them. [ Webster 1913 Suppl. ]

n. [ Gr. &unr_; the letter &unr_;, &unr_;. Cf. Itacism. ] (Greek Gram.) The pronunciation of the Greek η (eta) like the Italian e long, that is like a in the English word ate. See Itacism. [ 1913 Webster ]

n. [ L. metacismus, Gr. &unr_; fondness for the letter μ. ] A defect in pronouncing the letter m, or a too frequent use of it. [ 1913 Webster ]